JP4554275B2 - Sanitary napkin - Google Patents

Description

  The present invention relates to a sanitary napkin having a three-dimensional structure that abuts against at least one of a vagina or a rupture extending backward from the anus of the body, and in particular, in a state where the three-dimensional structure abuts on the body, The present invention relates to a sanitary napkin that can easily maintain a curved shape along the outer shape of the body.

  Some conventional sanitary napkins are provided with a convex structure portion that is in close contact with the body on the skin side surface of a napkin body having a liquid absorbing layer.

  The thing of the following patent documents 1 is provided with the elastic member extended in the vertical direction between the liquid absorption layer and the surface sheet which covers the surface. The elastic member exerts an elastic contraction force that causes the front edge and the rear edge of the sanitary napkin to approach each other. As a result, the sanitary napkin is curved and deformed so that the skin side surface is recessed, and the surface sheet is formed by the elastic member. Is lifted away from the absorber. The top sheet lifted from the absorber is brought into close contact with the body so that menstrual blood can be absorbed by the liquid absorption layer through the top sheet.

  The thing of patent document 2 is provided with the solid wall whose section formed with the liquid-permeable sheet was T-shaped on the skin side surface of the napkin main body. The three-dimensional wall is provided with an elastic member that exerts a contracting force in the vertical direction. The elastic member acts to bring the front edge portion and the rear edge portion of the napkin body close to each other, and the napkin body is curved. By doing so, the three-dimensional wall rises from the skin side surface of the napkin body. By bringing the three-dimensional wall into close contact with the female genitals, the sanitary napkin and the female genitals are intended to provide a feeling of wearing.

  The sanitary napkin described in Patent Document 3 has a first absorbent member having a triangular cross section. The first absorption member has an absorption nucleus that absorbs and holds the liquid and an outer cover that covers the absorption nucleus. In the sanitary napkin described in Patent Document 3, the first absorbent member is in close contact with the vaginal opening, and menstrual blood is mainly absorbed and held by the first absorbent member. In addition, the sanitary napkin is provided with a flat second absorbent member that comes into contact with clothing, and the first absorbent member is installed on the surface of the second absorbent member.

  The sanitary napkin described in Patent Document 4 is provided with an absorbent material tube having a function of absorbing liquid. The absorbent material tube is composed of an absorbent material formed in a cylindrical shape and a cover covering the absorbent material, and the absorbent material tube can be comfortably fitted to the vaginal opening of the wearer. Yes. And the said absorptive material pipe | tube is installed in the surface of the base pad.

  In the device described in Patent Document 5, a knot having a triangular cross section is raised on the skin side surface of the sanitary napkin. The hump is composed of an absorbent body and a reinforcing member provided between a liquid-permeable surface sheet and a liquid absorbing layer, and the reinforcing member is made of a hard material such as a plastic sheet. When the hump reinforced with the reinforcing member hits the vaginal opening and receives a compressive force due to body pressure, the hump is not crushed and the sanitary napkin and the vaginal opening can be kept in close contact with each other. .

Next, in the sanitary napkin described in Patent Document 6 below, a chevron-shaped protrusion is provided in the rear region of the skin-side surface. In the description of Patent Document 6, it is unclear what means the protrusions are made of, but the protrusions contact the hip grooves to prevent back leakage of menstrual blood.
JP 2000-83994 A JP 2002-320638 A Japanese National Patent Publication No. 11-500940 Japanese translation of PCT publication No. 2002-512851 JP-T-2001-504727 JP-A-11-42250

  Both of Patent Document 1 and Patent Document 2 have a three-dimensional structure that rises from the skin-side surface of the napkin body and contacts the vaginal opening. The solid structure itself does not have the rigidity to maintain the shape of the three-dimensional structure portion, and the raised state of the three-dimensional structure portion is maintained by a thread-like elastic member that exhibits an elastic contraction force in the vertical direction.

  For this reason, when the three-dimensional structure portion comes into contact with the vaginal opening, the wearer may feel a local pressure due to the tension of the elastic member to cause a sense of incongruity. Therefore, it is necessary to set the tension of the elastic member weakly. The three-dimensional structure with a low tension of the elastic member makes contact with the body with a relatively soft feel, so it is suitable for close contact with the vaginal opening, but starting from the anus in the body groove Rigidity that can only enter the crack extending backward is not possible. Therefore, the effect of keeping the three-dimensional structure part closely in the crack and stopping menstrual blood flowing through the crack at the time of going to bed is low.

  Next, the thing of patent document 3 thru | or patent document 5 is provided with the three-dimensional structure part which has an absorber in the skin side surface of a napkin main body. However, in the case where the absorbent body is provided on the skin side surface of the napkin body, the three-dimensional structure contracts in the vertical direction when the napkin body is curved so as to adhere to the surface of the groin from the woman's crotch. Exhibits compression repulsion. Therefore, the sanitary napkin tries to restore a flat shape when worn on the body, and a gap is easily formed between the skin side surface of the napkin body and the body.

  Moreover, since the thing of patent document 5 contains hard members, such as a plastic sheet, in the inside of a three-dimensional structure part, this hard member will prevent the curvature of a napkin main body. Moreover, it is easy to give a wearer an uncomfortable feeling when the hard member hits the body.

  Next, the structure described in Patent Document 6 is unclear as to the structure of the protrusion. However, similar to the structures described in Patent Document 3 to Patent Document 5, the protrusion is formed of the napkin body. It tends to function to prevent it from trying to bend.

  The present invention solves the above-mentioned conventional problem, and in a state where the three-dimensional structure portion on the skin side surface is in close contact with the body, the napkin body is easily bent from the crotch portion along the surface shape of the buttocks, An object of the present invention is to provide a sanitary napkin in which a gap is not easily formed between the napkin body.

  Another object of the present invention is to provide a sanitary napkin capable of exerting an effect of preventing leakage of menstrual blood to the back of the body by bringing the three-dimensional structure portion into close contact with the fissure.

The present invention is a sanitary napkin provided with a napkin body having a liquid absorption layer for absorbing and holding liquid, and a three-dimensional structure provided on the skin side surface of the napkin body and raised from the skin side surface.
The three-dimensional structure part has a reinforcing member that can be deformed when it receives a load from the skin side while maintaining a raised state from the skin side surface,
The reinforcing member has both wall surfaces facing in the width direction on both sides of a top portion extending in the longitudinal direction, and a cavity is formed between the both wall surfaces, and the both wall surfaces are directed from the skin side surface toward the top portion. A plurality of high-density parts extending in a row and low-density parts having a density lower than the high-density parts are alternately formed in the longitudinal direction,
When an elastic member for shortening the top portion of the reinforcing member in the vertical direction is provided, and the front end and the rear end in the vertical direction of the three-dimensional structure portion approach each other, and the napkin body is curved and deformed so that the skin side surface is recessed In the reinforcing member, the low-density portion is deformed at the top and the high-density portions are close to each other, and the longitudinal length of the top is larger than the length of the reinforcing member on the skin side surface. Is also shortened.
Further, the present invention is a sanitary napkin provided with a napkin body having a liquid absorption layer for absorbing and holding liquid, and a three-dimensional structure provided on the skin side surface of the napkin body and raised from the skin side surface.
The three-dimensional structure part has a reinforcing member that can be deformed when it receives a load from the skin side while maintaining a raised state from the skin side surface,
The reinforcing member has both wall surfaces facing in the width direction on both sides of a top portion extending in the vertical direction, and a cavity is formed between the both wall surfaces, and the both wall surfaces are directed from the top portion toward the skin side surface. A plurality of cut portions cut in the vertical direction are provided at intervals in the vertical direction, the vertical opening size of the deleted portion is widened on the top side compared to the skin side surface side,
When an elastic member for shortening the top portion of the reinforcing member in the vertical direction is provided, and the front end and the rear end in the vertical direction of the three-dimensional structure portion approach each other, and the napkin body is curved and deformed so that the skin side surface is recessed The reinforcing member is in close contact with the reinforcing members positioned before and after the deleted portion at the top, so that the longitudinal length of the top is shorter than the length of the reinforcing member on the skin side surface. It is characterized by that.

  Since the three-dimensional structure of the sanitary napkin has a relatively high rigidity, the sanitary napkin is in close contact with the vaginal opening or in the cleft. Moreover, since the three-dimensional structure portion can be deformed by the pressure from the skin side, the three-dimensional structure portion is less likely to give a sense of incongruity to the vaginal opening or rupture. Further, since the three-dimensional structure portion has a structure in which the top portion facing the skin side is shortened in the vertical direction, the napkin body is curved so as to follow the surface from the crotch portion to the buttocks while the three-dimensional structure portion is in close contact with the body. It becomes easy. Therefore, it is easy to maintain the close contact state between the napkin body and the body.

The elastic contraction member to shorten the top of the reinforcing member in the longitudinal direction is provided, that the top portion of the three-dimensional structure is contracted in the longitudinal direction, it tends to bend the napkin body.

Since the reinforcing member is a cavity between the two walls, the pressure from the buttocks of the skin when applied to the both wall surfaces, the three-dimensional structure is free to deform enters the three-dimensional structure within the gluteal cleft.

In the invention, it is possible that the reinforcing member is formed of an airlaid nonwoven fabric and the surface of the reinforcing member is covered with a liquid-permeable sheet.

When the reinforcing member is formed of an airlaid nonwoven fabric , menstrual blood adhering to the three-dimensional structure is held by the reinforcing member, and further, it is easy to transfer to the liquid absorbing layer of the napkin body.

  In the present invention, the napkin main body has a vertically long shape having a vagina facing portion and a crack facing portion extending rearward from the vagina facing portion, and the three-dimensional structure portion is provided at least in the crack facing portion. It is.

  The three-dimensional structure of the present invention is easy to maintain a raised state from the skin side surface of the napkin body, and the top of the three-dimensional structure tends to have a curved shape, so that this three-dimensional structure enters the crack and closely adheres to the crack. It becomes easy to do. Therefore, menstrual blood that tends to move to the back of the napkin along the rupture is easily retained.

  The present invention is a structure in which the three-dimensional structure provided on the skin side surface of the napkin body can maintain a raised state by itself, so that it can adhere to the body without a sense of incongruity, and can enter and adhere to the inside of the crack. is there. Further, since the three-dimensional structure portion has a structure in which the top portion can be shortened in the vertical direction, the napkin body is easily deformed from the crotch portion to the surface of the heel portion in a state where the three-dimensional structure portion is in close contact with the body.

  1 is a perspective view showing a sanitary napkin according to a first embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the sanitary napkin in a flat state, and FIG. 3 is a sectional view of the sanitary napkin shown in FIG. It is the cross-sectional view cut | disconnected by the -III line. FIG. 4 is a longitudinal sectional view showing a state where the sanitary napkin is curved. FIG. 5 is a partial longitudinal sectional view showing the top of the three-dimensional structure provided on the sanitary napkin. FIG. 5A shows a state in which the sanitary napkin is flat, and FIG. 5B shows a state in which the sanitary napkin is curved. Indicates.

  Hereinafter, of the two surfaces of each element constituting the sanitary napkin 1, the surface facing the body is referred to as “skin-side surface”, and the opposite surface is referred to as “clothing-side surface”. The longitudinal direction of the sanitary napkin is referred to as “vertical direction”, and the direction orthogonal to the vertical direction is referred to as “width direction”. Unless otherwise specified, the dimension of each element is referred to as the “length dimension” when measured in the vertical direction, and the dimension measured in the width direction as “width dimension”.

  The sanitary napkin 1 according to the first embodiment includes a napkin main body 2 and a three-dimensional structure portion 3 located on the skin side surface of the napkin main body 2.

  As shown in FIGS. 2 to 4, the napkin body 2 covers the liquid-insulating back sheet 21 located on the clothing side surface, the liquid absorbing layer 22 installed thereon, and the liquid absorbing layer 22. And a liquid-permeable surface sheet 23.

  As shown in FIG. 1, the napkin body 2 has a curved rear edge 5 as well as a curved front edge 4. The napkin body 2 has a vertically long shape with a maximum length dimension of 280 to 450 mm. The liquid absorbing layer 22 also has a vertically long shape, and the liquid absorbing layer 22 is positioned slightly inward of the curved front end portion 22a positioned slightly inside the front edge portion 4 and the rear edge portion 5. It has a curved rear end 22b. Further, the left and right end portions 22c and 22c of the liquid absorbing layer 22 have a linear shape parallel to the longitudinal center line Oy.

  The shape of the both side portions of the napkin body 2 is such that the front flap portions 6 and 6 projecting to the left and right sides from the both side end portions 22c and 22c of the liquid absorption layer 22 and the rear side from the front flap portions 6 and 6 in the front. , And flap flap portions 7 and 7 projecting to the left and right sides, and rear flap portions 8 and 8 projecting to the left and right sides further behind the flap flap portions 7 and 7. In the front flap portions 6, 6, the folded flap portions 7, 7 and the rear flap portions 8, 8, the back sheet 21 and the top sheet 23 are overlapped and bonded to each other with a hot melt adhesive. In addition, a liquid-blocking side sheet is provided on both sides of the skin side surface of the napkin body, and the front flap parts 6, 6, the folded flap parts 7, 7 and the rear flap parts 8, 8 are the back sheet 21. And the side sheet.

The back sheet 21 constituting the napkin body 2 is a film such as a polyethylene resin having a basis weight of about 30 g / m ² , and preferably a moisture permeable one. The liquid absorption layer 22 is a mixture of pulverized pulp and superabsorbent polymer (SAP), and is further wrapped with hydrophilic tissue paper, and the basis weight of the pulverized pulp is about 400 g / m ² .

The surface sheet 23 is a through-air nonwoven fabric having a basis weight of about 20 g / m ² . The fiber constituting the through-air nonwoven fabric is a core-sheath type composite synthetic fiber in which the core part is a polypropylene resin and the sheath part is a polyethylene resin, and the core part is mixed with an inorganic filler such as titanium oxide. .

The liquid permeable sheet constituting the surface sheet 23 is not limited to a through-air nonwoven fabric, and may be a point bond nonwoven fabric, a spunlace nonwoven fabric, a spunbond nonwoven fabric, or the like. In order to improve the liquid permeability, a fiber is used. The density is preferably 0.12 g / cm ³ or less. Moreover, the said surface sheet 23 may be formed with the resin film which has many liquid permeation holes.

  X1 shown in FIG. 1 is a vagina-facing reference line, and this vagina-facing reference line X1 is located in a range of 100 to 200 mm rearward from the front edge 4 of the napkin body 2, for example, the front edge 4 It is located about 150 mm away from the rear.

  The vagina-facing reference line X1 referred to here means a position that serves as a guideline that substantially coincides with the center of the vagina when the sanitary napkin 1 is fixed to the undergarment and attached to the crotch. This guideline is derived from the overall design of the sanitary napkin when viewed from the skin side surface and the shape of the compression line formed on the skin side surface. Thus, when the folded flap portions 7 and 7 projecting on both the left and right sides are present, the center position of the vertical dimension of the folded flaps 7 and 7 is usually a guide for making the center portion of the vaginal opening face the center portion.

  Therefore, in this embodiment, a line passing through the centers of the folded back flaps 7 and 7 is defined as the vagina-facing reference line X1.

  X2 shown in FIG. 1 is an anus-facing reference line, and the anus-facing reference line X2 faces the anus when the vagina-facing reference line X1 coincides with the center position of the vaginal opening. This anus-facing reference line X2 differs depending on the wearer's body, but is usually at a position 30 to 70 mm away from the vagina-facing reference line X1 rearward.

  X3 shown in FIG. 1 is a caudal bone facing reference line. When the vagina-facing reference line X1 coincides with the center position of the vaginal opening, the tailbone-facing reference line X3 faces the tailbone. The tailbone-facing reference line X3 differs depending on the wearer's body, but is usually located at a position 120 to 180 mm away from the vagina-facing reference line X1 rearward. The rear edge portion 5 of the napkin body 2 and the rear end portion 22b of the liquid absorption layer 22 are located further rearward than the caudal bone facing reference line X3.

  In a woman's crotch, a “body groove” is formed from the front end of the vagina (the front end of the labia) to the tailbone, but in this specification, the “body groove” of the “body groove” starts from the vicinity of the anus and then the tailbone The groove located over is expressed as “explosion”. In the sanitary napkin 1 shown in FIG. 1, the range from the front 50 mm to the rear 50 mm of the vagina-facing reference line X1 is the vagina-facing portion, and the range from the anal-facing reference line X2 to the caudal-facing reference line X3 is It is a crack opposing part.

  The sanitary napkin 1 is provided with a three-dimensional structure 3 mainly on the rear part of the napkin main body 2. The three-dimensional structure 3 is intended to be in contact with at least the crack of the body groove. Therefore, at least a part of the three-dimensional structure portion 3 is provided in a rupture facing portion between the anus facing reference line X2 and the caudal bone facing reference line X3.

  In the sanitary napkin 1 shown in FIG. 1, the front leading end 31 of the three-dimensional structure 3 is located in front of the anus-facing reference line X2 and slightly rearward of the vagina-facing reference line X1. Further, the posterior start 32 is located slightly forward of the tailbone facing reference line X3.

  As shown in FIG. 2, when the sanitary napkin 1 is in a flat state, the height dimension H from the skin-side surface of the napkin body 2 to the top 3 a of the three-dimensional structure 3 is the front leading end 31 and The apex 3a gradually increases from the rear starting edge 32 toward the middle, and the apex 3a has a curved shape that protrudes toward the skin side along the longitudinal center line Oy of the napkin body 2. It is preferable that the maximum value Hmax of the height dimension exists within a range of 50 mm from the position where the depth of the rupture of the body is maximum, that is, the anus-facing reference line X2 as a starting point. .

  As shown in FIG. 3, the three-dimensional structure 3 has a pair of wall surfaces 33, 33 extending in the vertical direction on both the left and right sides. A width dimension between the surfaces of the wall surface 33 and the wall surface 33 is a shape that gradually narrows from the hem portion located near the skin side surface of the napkin body 2 toward the top portion 3a. The width dimension W1 of the hem part of the three-dimensional structure 3 is a dimension measured at a position h1 = 10 mm away from the skin side surface of the napkin body 2, and the width dimension W1 of the hem part is preferably in the range of 15 to 45 mm. . If the width dimension W1 is in the range of 15 to 45 mm, the three-dimensional structure 3 can enter the crack without any sense of incongruity.

  As shown in FIG. 3, when the width dimension at the position h2 = 3 mm lower than the top part 3a of the three-dimensional structure part 3 is the width dimension W2 of the top part, the width dimension W2 is preferably in the range of 1 to 5 mm, more preferably 1 to 3 mm. When the width is within the above range, the top 3a can enter the inner part of the body groove, and if the width dimension is 1 mm or more, even if the top part 3a hits the back of the body groove, Preventing excessive stimulation.

  The maximum value Hmax of the height dimension of the three-dimensional structure 3 is preferably in the range of 25 to 60 mm. Within the above range, the top portion 3a of the three-dimensional structure portion 3 can enter to the back of the crack.

  The opening angle θ between the wall surface 33 and the wall surface 33 of the three-dimensional structure 3 is 120 degrees or less, preferably 90 degrees or less. More preferably, it is 60 degrees or less or 45 degrees or less. The opening angle θ is an angle formed between the wall surface 33 and the outer surface of the wall surface 33 when the cross-sectional shape of the three-dimensional structure portion 3 is a triangle as shown in FIG. Further, in the cross section shown in FIG. 3, when the wall surface 33 and the outer surface of the wall surface 33 have a curvilinear shape that swells to the left and right, the position of ½ of the height dimension from the skin side surface of the napkin body 2 to the top 3 a , The angle formed by the tangent lines that contact the outer surface of the wall surface 33 and extend in the height direction.

  The angle θ is measured by using a measuring jig having a cylindrical inner peripheral surface with a radius of 110 mm, with the sanitary napkin 1 oriented in the longitudinal direction of the sanitary napkin 1 in the direction of curvature of the cylindrical inner peripheral surface. 1 is performed in a state where the clothing side surface of 1 is adhered to the inner circumferential surface of the cylinder. At this time, the θ is measured at a position where the rising height of the three-dimensional structure portion 3 is highest from the skin side surface of the napkin body 2.

  Moreover, the cross-sectional shape of the three-dimensional structure 3 is not limited to the triangle shown in FIG. 3. For example, the top 3 a is a flat shape, or both wall surfaces 33, 33 have curved bulges on the left and right sides. It may be.

  As shown in FIGS. 1 and 3, a joining piece 34 is integrally provided at the lower ends of the both wall surfaces 33, 33 of the three-dimensional structure portion 3, and this joining piece 34 is provided on the skin side of the napkin body 2. The surface is bonded and fixed with a hot-melt adhesive. In this embodiment, the three-dimensional structure 3 is fixed so as not to be separated from the skin-side surface over its entire length. However, even if only the vicinity of the front starting edge 31 and the vicinity of the rear starting edge 32 of the three-dimensional structure 3 are fixed to the skin side surface, the intermediate portion thereof can freely move in the width direction with respect to the skin side surface. Good. If comprised in this way, it will become easy to maintain the state which the three-dimensional structure part 3 contact | adhered to the crack, also when the napkin main body 2 moves to the left and right with the underwear in the state where the three-dimensional structure part 3 adhered to the crack. .

  As shown in FIG. 3, the three-dimensional structure 3 includes a reinforcing member 35 and a liquid-permeable sheet 36 that covers the surface of the reinforcing member 35 that contacts the skin. The reinforcing member 35 has a function of absorbing and holding liquid as well as a function of increasing rigidity. The interior of the three-dimensional structure 3 is a cavity.

The reinforcing member 35 is an air laid nonwoven fabric. A mixed fiber obtained by blending 30% by mass of pulp and 70% by mass of a core / sheath composite synthetic fiber having a core part made of polypropylene resin and a sheath part made of polyethylene resin is an air laid method. And the fibers are joined by the thermal adhesive force of the polyethylene resin. The overall weight of the reinforcing member 35 is about 60 to 300 g / m ² . Alternatively, the reinforcing member 35 is an air laid nonwoven fabric (air laid pulp) in which pulp is laminated by 70% by mass or more and synthetic resin fibers 0 to 30% by an air laid method, and fibers are joined with a binder. Also good.

  As shown in FIGS. 4 and 5, the reinforcing member 35 is formed with a high-density portion 37 that is heated, pressed and compressed by embossing. The high-density portions 37 are formed in parallel to each other so as to rise substantially vertically from the skin-side surface of the napkin body 2 toward the top portion 3a at intervals in the vertical direction. Therefore, the reinforcing member 35 has the high density portions 37 compressed by the embossing and the low density portions 38 not embossed alternately formed in the vertical direction.

  By the reinforcing member 35 formed of the airlaid nonwoven fabric, the respective wall surfaces 33, 33 are formed separately, and the two reinforcing members 35 are bonded to each other with a hot-melt adhesive at the top portion 3a. A three-dimensional structure 3 is configured. The reinforcing members 35 and 35 are covered with the same liquid-permeable sheet 36. The liquid permeable sheet 36 is a through-air nonwoven fabric formed of heat-sealable synthetic resin fibers, and the liquid permeable sheet 36 and the reinforcing member 35 are coated with a hot melt applied within a range that does not impede liquid permeation. They are bonded to each other with a mold adhesive.

The liquid-permeable sheet 36 is not limited to a through-air nonwoven fabric, and may be a point bond nonwoven fabric, a spunlace nonwoven fabric, a spunbond nonwoven fabric, or the like. However, in order to improve the liquid permeability, the fiber density is 0.12 g / It is preferable that it is cm ³ or less.

The reinforcing member 35 is a through-air nonwoven fabric or a point bond nonwoven fabric formed of at least one of polyethylene fiber, polypropylene fiber, polyester fiber, polyethylene-polypropylene composite synthetic fiber, and polyethylene-polyester composite synthetic fiber. It can also be formed of a spunbond nonwoven fabric. For example, a plurality of non-woven fabrics are laminated, the basis weight is adjusted to about 60 to 300 g / m ² , and the non-woven fabrics are joined by hot embossing or a bonding process using a hot melt adhesive.

  In this way, the reinforcing member 35 composed only of synthetic resin fibers can pass menstrual blood toward the liquid absorbing layer 22, and the reinforcing member 35 itself is difficult to absorb and retain menstrual blood. Menstrual blood is less likely to remain in the structure portion 3, and it is possible to prevent the skin from becoming sticky.

  As shown in FIG. 5, at the top 3 a of the three-dimensional structure 3, an elastic contracting member 39 is fixed inside the reinforcing member 35. The elastic contraction member 39 is, for example, a polyurethane elastic thread having a fineness of 3760 dtex, and one or a plurality of the elastic contraction members 39 are used in the longitudinal direction between the front start end 31 and the rear start end 32. It is arranged toward. The elastic contraction member 39 is bonded and fixed to the reinforcing member 35 with a hot-melt adhesive 41 at the top 3a. The elastic contraction member 39 is bonded and fixed to the reinforcing member 35 in a state where the three-dimensional structure portion 3 is stretched about 1.2 to 1.5 times the total length of the top portion 3a when the three-dimensional structure portion 3 is in the state shown in FIG. Yes.

  In addition, the reinforcing member 35 is formed by using two sheets of airlaid nonwoven fabric or a plurality of nonwoven fabrics joined as described above and joining them together, and embossing both sheets together to A high-density portion may be formed, and the elastic contraction member 39 may be disposed between the two sheets at the top portion 3a and bonded and fixed.

  The three-dimensional structure 3 may be formed by folding an airlaid nonwoven fabric or a sheet in which a plurality of nonwoven fabrics are joined into a mountain shape, and the fold line portion may be located at the top 3a.

  As shown in FIG. 3, pressure-sensitive adhesive layers 25, 25 are provided on the outer surface of the back sheet 21 on the clothing side surface of the napkin body 2. The pressure-sensitive adhesive layers 25, 25 are belt-like and extend continuously in the vertical direction. The pressure-sensitive adhesive layers 25 and 25 are preferably provided directly below the joining piece 34 of the three-dimensional structure 3. By directly bonding and fixing the portion directly below the joining piece 34 to the undergarment, it becomes easy to maintain the state in which the three-dimensional structure 3 is opposed to the crack.

  Although not shown in the drawings, pressure sensitive adhesion is also applied to the clothing side surface of the back sheet 21 in the region where the folded flap portions 7 and 7 are formed and the region where the rear flap portions 8 and 8 are formed. An agent layer is provided.

  When the sanitary napkin 1 is used, a pressure-sensitive adhesive layer 25 provided on the clothing side surface of the napkin body 2 is bonded to the inner surface of the undergarment. Further, the folded flap portions 7 and 7 are folded back toward the outer surface from both side edges of the crotch portion of the underwear, and the pressure-sensitive adhesive layer provided on the clothing side surface of the folded flap portions 7 and 7 is bonded to the outer surface of the crotch portion. To do. Further, a pressure-sensitive adhesive layer provided on the clothing side surface of the rear flaps 8 and 8 is bonded to the lower inner surface of the back body of the underwear.

  When the user attaches the sanitary napkin 1 to the undergarment, the center position of the folded flap portions 7 and 7 (the vaginal opposition reference line X1) is used as a guide for positioning, and the center position is approximately in the front-rear direction of the vaginal opening. Wear to match the center.

  In the state where the sanitary napkin 1 is fixed to the undergarment, the elastic contraction member 39 provided on the top 3a of the three-dimensional structure 3 is elastically contracted as shown in FIG. The elastic contraction member 39 is bonded to the reinforcing member 35 by a hot melt adhesive 41. However, when the elastic contraction member 39 contracts as shown in FIG. And the gap between the high density portions 37 is reduced, the low density portions 38 are deformed, and pleats are formed on the reinforcing member 35 at the top 3 a of the three-dimensional structure portion 3. As a result, the vertical dimension of the three-dimensional structure 3 is shortened.

  On the other hand, since the force that contracts the length in the vertical direction does not act on the three-dimensional structure 3 at the joint between the napkin body 2 and the skin side surface, the napkin body 2 tends to be curved. Further, in the sanitary napkin 1, the elastic contraction force of the elastic contraction member 39 acts so as to bring the front start end 31 and the rear start end 32 close to each other. It bends and deforms so that the side surface is recessed.

  As shown in FIG. 4, when the sanitary napkin 1 is in a curved state, the total length of the top 3 a of the three-dimensional structure 3 is such that the napkin body is between the front start 31 and the back start 32. It is preferable that it becomes 60 to 90% of the length dimension along 2 skin side surfaces, More preferably, it is 70 to 85%.

  FIG. 13 shows a state in which the sanitary napkin 1 is attached to a woman's crotch part, and FIG. 14 is a cross-sectional view taken along the line XIV-XIV in FIG. It shows the state of getting in.

  As shown in FIG. 3, the three-dimensional structure 3 has a shape in which the width dimension between the wall surfaces 33 and 33 gradually decreases toward the top 3a, and the width dimension W2 of the tip is 1 to 5 mm. It is a range, Preferably it is the range of 1-3 mm. The opening angle θ between the wall surfaces 33 and 33 is 90 degrees or less, preferably 60 degrees or less, and more preferably 45 degrees or less.

Therefore, the three-dimensional structure 3 can enter and adhere to the inside of the body groove from slightly behind the tail of the vaginal opening to slightly forward of the tailbone. The reinforcing member 35 of the three-dimensional structure 3 is an air laid nonwoven fabric or the like, and has a weight per unit area of 60 to 300 g / m ² and has itself elasticity and rigidity, and further has a high density portion extending in the height direction. Since it has 37, it is not easily crushed in the state of entering the crack. Further, since the reinforcing member 35 can be elastically deformed by the applied pressure acting on the top portion 3a, it can follow the change in the depth of the body groove, and can maintain a close contact with the inside of the body groove before and after the body. Furthermore, since the interior of the three-dimensional structure 3 is hollow, the width dimension can be freely changed even when the skin on both sides of the body groove approaches.

  While the three-dimensional structure portion 3 has the rigidity to enter the crack as described above, the napkin main body 2 has a curved shape as shown in FIG. 4, so the skin of the napkin main body 2 as shown in FIG. The side surface comes to follow the curved shape of the skin surface from the crotch part of the body toward the buttocks. Therefore, the gap between the body and the skin-side surface of the napkin body 2 is not too much, and it becomes easy to prevent menstrual blood from leaking.

  In the said embodiment, as shown in FIG. 4, in the state which the top part 3a of the three-dimensional structure part 3 was shortened, the shape of this top part is a projecting curve shape toward the skin side. When the top 3a has a curved shape while the napkin body 2 is curved, the top easily enters the deepest part of the fissure located behind the anus of the body.

  The menstrual blood that has come out from the vaginal opening passes through the surface sheet 23 of the napkin body 2 and is absorbed and held by the liquid absorbing layer 22. Menstrual blood that is going to move backward from the anus along the rupture at the time of going to bed or the like is given to the three-dimensional structure 3 that is in close contact with the groove of the body, and permeates the liquid permeable sheet 36 to have a liquid absorbing function. The reinforcing member 35 is absorbed. Since the reinforcing member 35 is an airlaid nonwoven fabric containing 70% by mass of synthetic resin fiber, menstrual blood given to the reinforcing member 35 is transferred to the liquid absorbing layer 22 through the reinforcing member 35 and the liquid permeable sheet 36. It becomes easy to be given. Therefore, the reinforcing member 35 preferably contains 50% by mass or more of synthetic resin fiber. Alternatively, when the reinforcing member 35 is formed of only synthetic resin fibers as described above, menstrual blood hardly remains in the three-dimensional structure portion 3.

  6 is a perspective view showing a sanitary napkin 101 according to a second embodiment of the present invention, FIG. 7 is a cross-sectional view of the sanitary napkin 101 of FIG. 6 taken along the line VII-VII, and FIG. 6 is a transverse cross-sectional view of the sanitary napkin 101 according to FIG. 6 cut along line VIII-VIII.

  The napkin main body 2 shown in FIG. 6 is the same as the napkin main body of the first embodiment shown in FIGS.

  In the second embodiment, a surface component 102 extending along the longitudinal center line Oy is attached to the skin side surface of the napkin body 2. As shown in FIGS. 7 and 8, the surface constituent element 102 includes a reinforcing member 135 having a liquid absorbing function and a liquid permeable sheet 136 that covers the surface of the reinforcing member 135 in contact with the skin. The reinforcing member 135 is an air laid nonwoven fabric that includes pulp and synthetic resin fibers, and the synthetic resin fibers are contained in an amount of 50% by mass or more and, for example, 70% by mass. Wall surfaces 133 and 133 are formed by one or a plurality of the airlaid nonwoven fabrics. Alternatively, as described above, a plurality of non-woven fabrics formed only of synthetic resin fibers are joined.

  The liquid permeable sheet 136 is made of the same through-air nonwoven fabric as the liquid permeable sheet 36. The reinforcing member 135 and the liquid permeable sheet 136 are bonded to each other by a hot melt adhesive applied with a basis weight that does not hinder the permeation of the liquid.

  As shown in FIG. 6, a three-dimensional structure 103 is formed by the surface constituent element 102 between a front starting end 131 and a rear starting end 132. As shown in FIG. 8, the three-dimensional structure 103 has a hollow inside, and the width dimension between the surfaces of the wall surfaces 133 and 133 gradually increases from the top 103 a toward the napkin body 2, and the skin side of the napkin body 2 Protruding tops 103b and 103b having a maximum width dimension are formed at positions 10 mm or more away from the surface upward. And the said width dimension is gradually narrowed toward the skin side surface of the napkin main body 2 from these right and left protrusion top parts 103b and 103b. Further, joining pieces 134, 134 extending in the vertical direction are formed on the base portion of the three-dimensional structure 103 continuously in the vertical direction, and these joining pieces 134, 134 are hot-melt adhesive on the skin side surface of the napkin body 2. Is fixed by bonding.

  In the three-dimensional structure 103, the reinforcing member 135 has an embossed high density portion 137 and an unembossed low density portion 138 formed rearward in the vertical direction. The high density portion 137 is formed to extend substantially vertically from the skin side surface of the napkin main body 2 toward the top portion 103a on both the wall surfaces 133, 133, and extends in parallel with each other at an interval in the vertical direction.

  Further, the elastic contraction member 139 is installed between the front starting end 131 and the rear starting end 132, and is bonded and fixed to the inner surface of the reinforcing member 135 at the top 103a.

  The front starting end 131 of the three-dimensional structure 103 is present at a position 10 to 20 mm away from the vagina-facing reference line X1, and the rear starting end 132 is positioned slightly forward from the caudal bone facing reference line X3. . Therefore, the three-dimensional structure 103 can be closely attached in the rupture of the back of the vaginal opening through the anus.

  As shown in FIG. 7 and FIG. 8, the joining pieces 134, 134 of the surface component 102 are adhered and fixed to the skin side surface of the napkin body 2 in front of the front leading end 131, and the joining piece 134 is further fixed. The reinforcing member 125 and the liquid-permeable sheet 136 positioned between the first and second joining pieces 134 are folded into a flat state to form the front flat portion 104. Further, as shown in FIG. 6, the rear flat portion 105 is formed in the same manner also behind the rear starting end 132.

  In the sanitary napkin 101 according to the second embodiment, the length of the top 103a is shortened by the elastic contraction force of the elastic contraction member 139, and pleats are formed on the top 103a. As a result, as in the first embodiment, the three-dimensional structure 103 is raised with rigidity, while the napkin body 2 has a curved shape.

  Further, projecting top portions 103b and 103b are formed on the wall surfaces 133 and 133 of the three-dimensional structure portion 103, and the width dimension of the three-dimensional structure portion 103 is gradually narrowed toward the top portion 103a. For this reason, when the sanitary napkin 101 is attached to the crotch part, the upper part of the protruding top parts 103b, 103b comes into close contact with the body groove. Further, when the protruding top portions 103b and 103b are formed, the three-dimensional structure portion 103 is easily pressed and deformed toward the skin side surface of the napkin body 2 when the top portion 103a is pressed. Therefore, when the depth of the body groove changes at bedtime, the three-dimensional structure 3 can be freely deformed while closely contacting the body groove.

  In the three-dimensional structure 103, the lower portion of the front height is in close contact with the labia so that menstrual blood that has come out of the vaginal opening can be immediately captured by the three-dimensional structure 103. In addition, since the front flat portion 104 is in close contact with the front portion of the vaginal opening, the degree of close contact with the vaginal opening at this portion is increased, and menstrual blood is supplemented by the reinforcing member 135, so that it is easy to prevent side leakage of menstrual blood. Become.

  FIG. 9 is a perspective view showing a sanitary napkin 201 according to a third embodiment of the present invention. FIGS. 10A and 10B are partially broken views showing a three-dimensional structure provided on the sanitary napkin 201. FIG. It is a perspective view.

  The napkin body 2 of the sanitary napkin 201 is the same as the napkin body provided on the sanitary napkin 1 of the first embodiment and the sanitary napkin 101 of the second embodiment.

  A surface component 202 is provided on the skin side surface of the napkin body 2. As shown in FIGS. 10 (A) and 10 (B), the surface component 202 includes a reinforcing member 235 having a liquid absorbing function and formed of an airlaid nonwoven fabric as in the first embodiment and the second embodiment. And a liquid-permeable sheet 236 that covers the surface of the reinforcing member 235 that contacts the skin. The liquid permeable sheet 236 is the same as that used in each of the embodiments.

  In the surface component 202, joining pieces 234 and 234 provided at the base thereof are adhesively fixed to the skin side surface of the napkin body 2 with a hot melt adhesive. The reinforcing member 235 is folded in the same manner as the surface component 102 of the second embodiment shown in FIGS. 7 and 8, and, as shown in FIG. Thus, a three-dimensional structure 203 that rises from the skin side surface of the napkin body 2 is formed. Further, the front surface portion 202 forms a front flat portion 204 positioned in front of the front starting end 231 and a rear flat portion 205 positioned rearward of the rear starting end 232.

  As shown in FIGS. 10A and 10B, the reinforcing member 235 has a deletion portion 237 cut from the top portion 203a toward the joining piece 234, and the deletion portion 237 is formed in the vertical direction. A plurality of places are provided at intervals. The opening dimension La in the vertical direction of each deletion part 237 is the maximum at the top part 203a of the three-dimensional structure part 203, and the opening dimension La has a shape that gradually narrows toward the joining pieces 234 and 234. As shown in FIG. 10A, the reinforcing member 235 is partially cut into a V shape after the reinforcing member 235 is bent into a shape having a top portion 203a and a side top portion 203b. Can be formed.

  The reinforcing member 235 is covered with a liquid-permeable sheet 236 over the entire surface that contacts the skin.

When the sanitary napkin 201 is unfolded so that the clothing side surface is flat, the deleted portion 237 of the reinforcing member 235 forming the three-dimensional structure 203 is opened at the top 203a as shown in FIG. ing. However, when the skin side surface of the sanitary napkin 201 is directed toward the body and the napkin body 2 is curved and deformed along the skin surface from the crotch portion to the buttocks, as shown in FIG. Reinforcing members 235 positioned before and after are closely attached to each other, and the longitudinal length of the top portion 3a of the three-dimensional structure portion 3 is shortened.

  Therefore, when the napkin main body 2 has a curved shape, the three-dimensional structure 203 is hardly applied with a compression restoring force to return the napkin main body 2 to a flat shape, and the three-dimensional structure 203 is in close contact with the crack. In this state, the napkin body 2 can maintain the curved shape.

FIGS. 11A and 11B show a modification of the third embodiment of the present invention.
In the three-dimensional structure 203A shown in FIGS. 11A and 11B, the deleted portion 237 is formed in the reinforcing member 235. Further, the reinforcing member 235 and the liquid-permeable sheet 236 are formed at the top 203a of the three-dimensional structure 203. An elastic contraction member 239 that exerts an elastic contraction force in the vertical direction is provided therebetween.

  In the modified example, the elastic contraction member 239 exerts an elastic force that causes the front start end 231 and the rear start end 232 to approach each other in a state where no external force is applied to the sanitary napkin 201. As a result, the napkin body 2 As shown in FIG. 11B, the space of the deletion portion 237 is closed, and the longitudinal dimension of the top portion 203a is shortened.

  In the second embodiment shown in FIG. 9 and FIG. 10, the deletion part 237 is covered with a liquid-permeable sheet 236, and the deletion part 237 is not open to the outside. However, the liquid permeable sheet 236 may not be provided in the deletion unit 237, and the deletion unit 237 may be opened in the three-dimensional structure unit 203.

  Further, the reinforcing member 235 positioned before and after the deletion portion 237 may be completely separated.

  In the embodiment shown in FIG. 4, when the napkin body 2 is curved, the top portion 3 a of the three-dimensional structure portion 3 has a protruding curve shape toward the skin side. However, in each of the above embodiments, the top portion is In addition to the convex curve as described above, it may be concavely curved toward the napkin body.

  The present invention is not limited to the above embodiment, and various modifications are possible. For example, in the above-described embodiment, the three-dimensional structure portion is provided with the reinforcing members 35, 135, and 235 having a liquid absorption function. However, the three-dimensional structure portion includes the reinforcing member and a liquid separate from the reinforcing member. You may form with the absorption layer and the cushion layer.

  The three-dimensional structure 303 shown in FIG. 12 (A) is an air laid nonwoven fabric having a liquid absorbing function, an air laid nonwoven fabric (air laid pulp) formed only of pulp, paper, a spun lace nonwoven fabric formed of rayon fibers, and the like. A reinforcing member 334 is bonded to the inside of the formed liquid absorption layer 335. The reinforcing member 334 is paper, a urethane foam sheet, a polyethylene foam sheet, a resin sheet, or the like. The surface of the liquid absorption layer 335 is covered with a liquid permeable sheet 336.

  The three-dimensional structure portion 403 shown in FIG. 12B is provided with a reinforcing member 35 having a liquid absorption function formed of the same airlaid nonwoven fabric as that of the first embodiment. The surface of the reinforcing member 35 is covered with the top sheet 23 that covers the surface of the liquid absorption layer 22.

  The three-dimensional structure provided in each of the above embodiments can maintain a shape that is raised from the skin-side surface of the napkin body 2 itself, and can be elastically deformed by pressure from the skin.

  The rigidity of the three-dimensional structure portion is a pressure of 0.2 N per 10 mm length with a width of 1 mm with respect to the top portion where the height dimension of the three-dimensional structure portion is the maximum value Hmax in a state where the elastic contraction member is not provided. Is applied to the napkin body 2 and if the rate of decrease in the height is 66% or less, the three-dimensional structure 3 is placed in the groove Most of the parts can be kept in close contact with at least the non-association part.

  Further, when the elastic contraction member is not provided, a force of 0.3 N per 10 mm in length and 1 mm in width is applied to the top where the height dimension of the three-dimensional structure 3 is the maximum value Hmax. If the reduction rate of the height dimension of the top portion is 20% or more when applied toward the surface, even if the depth of the body groove changes at bedtime, the three-dimensional structure portion gives the body a sense of incongruity And the three-dimensional structure can continue to adhere to the body groove.

The perspective view which shows the sanitary napkin of the 1st Embodiment of this invention, A longitudinal sectional view of the sanitary napkin, Sectional drawing which cut | disconnected the sanitary napkin shown in FIG. 1 by the III-III line | wire, The longitudinal cross-sectional view which shows the state which the sanitary napkin of 1st Embodiment curved, (A) is a partial longitudinal sectional view showing the top of the three-dimensional structure when the napkin body is flat, (B) is a partial longitudinal sectional view showing the top of the three-dimensional structure when the napkin main body is curved, The perspective view which shows the sanitary napkin of the 2nd Embodiment of this invention, Sectional drawing of the VII-VII line of FIG. Sectional drawing of the VIII-VIII line of FIG. The perspective view which shows the sanitary napkin of the 3rd Embodiment of this invention, It is a fragmentary perspective view which shows the three-dimensional structure part of 3rd Embodiment, (A) is a state with a sanitary napkin flat, (B) shows the state where the sanitary napkin curved. It is a fragmentary perspective view which shows the modification of the three-dimensional structure part of 3rd Embodiment, (A) is a state with a sanitary napkin flat, (B) shows the state where the sanitary napkin curved. (A) (B) is a cross-sectional view showing the three-dimensional structure according to the embodiment, The longitudinal cross-sectional view which shows the state with which the sanitary napkin of this invention was mounted | worn to the crotch part of a woman, Sectional drawing of the XIV-XIV line | wire of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sanitary napkin 2 Napkin main body 3 Three-dimensional structure part 3a Top part 21 Back surface sheet 22 Liquid absorption layer 23 Top sheet 31 Front starting edge 32 Back starting edge 33 Wall part 34 Joining piece 35 Reinforcement member 36 Liquid permeable sheet 37 High density part 38 Low density portion 39 Elastic contraction member 102, 202 Surface component 103, 203 Three-dimensional structure portion 235 Reinforcing member 236 Liquid permeable sheet 237 Deletion portion X1 Vagina facing reference line X2 Anal facing reference line X3 Coccyx bone facing reference line

Claims (6)

In a sanitary napkin provided with a napkin main body having a liquid absorption layer for absorbing and holding liquid, and a three-dimensional structure provided on the skin side surface of the napkin main body and raised from the skin side surface,
The three-dimensional structure part has a reinforcing member that can be deformed when it receives a load from the skin side while maintaining a raised state from the skin side surface,
The reinforcing member has both wall surfaces facing in the width direction on both sides of a top portion extending in the longitudinal direction, and a cavity is formed between the both wall surfaces, and the both wall surfaces are directed from the skin side surface toward the top portion. A plurality of high-density parts extending in a row and low-density parts having a density lower than the high-density parts are alternately formed in the longitudinal direction,
When an elastic member for shortening the top portion of the reinforcing member in the vertical direction is provided, and the front end and the rear end in the vertical direction of the three-dimensional structure portion approach each other, and the napkin body is curved and deformed so that the skin side surface is recessed In the reinforcing member, the low-density portion is deformed at the top and the high-density portions are close to each other, and the longitudinal length of the top is larger than the length of the reinforcing member on the skin side surface. A sanitary napkin that is also shortened. The sanitary napkin according to claim 1, wherein the reinforcing member is an airlaid nonwoven fabric, and the high-density portion is formed by embossing. In a sanitary napkin provided with a napkin main body having a liquid absorption layer for absorbing and holding liquid, and a three-dimensional structure provided on the skin side surface of the napkin main body and raised from the skin side surface,
The three-dimensional structure part has a reinforcing member that can be deformed when it receives a load from the skin side while maintaining a raised state from the skin side surface,
The reinforcing member on both sides of the top extending longitudinally has two opposing wall surfaces in the width direction, the cavity between the two walls are formed, the both wall surface toward the skin surface from the top multiple removal portions cut Te are provided at intervals in the longitudinal direction, the longitudinal direction of the opening size of the deletion unit is laid out in the top side than on the body surface side,
When an elastic member for shortening the top portion of the reinforcing member in the vertical direction is provided, and the front end and the rear end in the vertical direction of the three-dimensional structure portion approach each other, and the napkin body is curved and deformed so that the skin side surface is recessed The reinforcing member is in close contact with the reinforcing members positioned before and after the deleted portion at the top, so that the longitudinal length of the top is shorter than the length of the reinforcing member on the skin side surface. A sanitary napkin characterized by that. The sanitary napkin according to claim 3, wherein the reinforcing member is an airlaid nonwoven fabric. Sanitary napkin according to any one of 4 to the surface of the reinforcing member claims 1 covered with the liquid-permeable sheet. The napkin body is a vertically long shape with a gluteal cleft facing portion extending backward than the vagina-facing portion, the three-dimensional structure can be of any claims 1 to 5 is provided on at least the intergluteal cleft facing portion sanitary napkin according to any one of claims.

Images